London, UK to Jyvaskyla is an approximately 13- hour flight. You can also drive. The time zone changes from Greenwich Mean Time to Eastern European Standard Time, which is usually a 2 hour difference. Plan for little chillier temperatures traveling from London in September, with highs in Jyvaskyla at 16°C and lows at 5°C. Finish your sightseeing early on the 17th (Thu) so you can travel back home.